I pulled up the page, and it says "2. The method of claim 1 wherein said active agent is an extract of Yerbamat (Ilex paraguariensis)" and " FIG. 8 shows the inhibition of MAO A and MAO B for Yerbamat." I found this entry a patent application made on: October 2, 2003; #20030185908; patented by Williams, Jonnie R. ; et al. My resource from the army had been removed, perhaps it was inaccurate or just old.
I consider the millions of people that drink mate, I highly doubt its MAOi inhibition is as strong, or would cause the same dietary issues. Unless you are already taking a MAOi - a seldom prescribed medication, presumably because of the dietary issues - your blood pressure could always be checked.
Weird, I got a spam warning, if this is a double post, I apologize.